4. Use the Buddy System
Find a friend or relative whom you like and trust who also wants to establish a healthier lifestyle, suggests Thompson. "Encourage one another. Exercise together. Use this as an opportunity to enjoy one another's company and to strengthen the relationship."
5. Make Your Plan Fit Your Life
Too busy to get to the gym? Tennis star Martina Navratilova, health and fitness ambassador for the AARP, knows a thing or two about being busy and staying fit.
Make your plan fit your life, she advises in an article on the AARP web site. "You don't need fancy exercise gear and gyms to get fit."
If you've got floor space, try simple floor exercises to target areas such as the hips and buttocks, legs and thighs, and chest and arms (like push-ups, squats, and lunges). Aim for 10-12 repetitions of each exercise, adding more reps and intensity as you build strength.
6. Be Happy
Be sure to pick an activity you actually enjoy doing, suggests Los Angeles celebrity trainer Sebastien Lagree.
"If you hate weights, don't go to the gym. You can lose weight and get in shape with any type of training or activity," he says.
And choose something that is convenient. Rock climbing may be a great workout, but if you live in a city, it's not something you'll be doing every day.
7. Watch the Clock
Your body clock, that is. Try to work out at the time you have the most energy, suggests Jason Theodosakis, MD, exercise physiologist at the University of Arizona College of Medicine. If you're a morning person, schedule your fitness activities early in the day; if you perk up as the day goes along, plan your activities in the afternoon or evening.
"Working out while you have the most energy will yield the best results," Theodosakis says.
8. Call In the Pros
Especially if you're first getting started, Theodosakis suggests having a professional assessment to determine what types of exercise you need most.
"For some people, attention to flexibility or to balance and agility, may be more important than resistance training or aerobics," he says. "By getting a professional assessment, you can determine your weakest links and focus on them. This will improve your overall fitness balance."